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Controlled production method for pickling-free SWRH82B hot rolled wire rod oxidized iron sheet

A technology for iron oxide scale and hot-rolled wire rod, applied in rolling mill control devices, metal rolling, roll speed control, etc., can solve the problems of high processing cost, labor cost, environmental pollution, etc. Quality, the effect of improving the adaptability of wire rod products and the low-cost competitiveness of users

Inactive Publication Date: 2019-10-18
SHOUGANG SHUICHENG IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the "three wastes" such as waste acid, waste water, and waste gas brought about by pickling have high treatment costs and labor costs, and have caused environmental problems such as pollution to the environment.

Method used

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  • Controlled production method for pickling-free SWRH82B hot rolled wire rod oxidized iron sheet
  • Controlled production method for pickling-free SWRH82B hot rolled wire rod oxidized iron sheet
  • Controlled production method for pickling-free SWRH82B hot rolled wire rod oxidized iron sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A control production method of pickling-free SWRH82B hot-rolled wire rod oxide scale, comprising the following steps: rolling temperature control → water penetration control cooling after rolling → silk spinning temperature control → roller table speed control → fan and air cooling control; The heating temperature of the heating furnace in the rolling temperature control is 1150°C; the starting rolling temperature is 1000°C; the finishing rolling temperature is 900°C; all the 5-stage water-through water tanks in the water-through-cooling after-rolling control are opened, and the water is passed evenly, and the recovery temperature is ≤30°C , weak water penetration at the end; the spinning temperature is controlled at 880°C; the air-cooled linear velocity range in the roller table speed control is 0.5m / s, the phase change position is 0.9m / s, and the speed in the heat preservation cover is 0.5m / s , the other speed is 0.7m / s; the air volume control in the fan and air coolin...

Embodiment 2

[0020] A control production method of pickling-free SWRH82B hot-rolled wire rod oxide scale, comprising the following steps: rolling temperature control → water penetration control cooling after rolling → silk spinning temperature control → roller table speed control → fan and air cooling control; The heating temperature of the heating furnace in the rolling temperature control is 1210°C; the rolling start temperature is 1050°C; the finishing rolling temperature is 930°C; all the 5-stage water passing tanks in the water passing and cooling after rolling are opened, the water is passed evenly, and the recovery temperature is ≤30°C , weak water penetration at the end; the spinning temperature is controlled to be 920°C; the air-cooling linear velocity in the roller table speed control is 0.9m / s, the phase transition position is 0.9m / s, and the speed in the heat preservation cover is 0.5m / s, Other speeds are 0.7m / s; the air volume control in the fan and air cooling control is 50%, ...

Embodiment 3

[0023] A control production method of pickling-free SWRH82B hot-rolled wire rod oxide scale, comprising the following steps: rolling temperature control → water penetration control cooling after rolling → silk spinning temperature control → roller table speed control → fan and air cooling control; The heating temperature of the heating furnace in the rolling temperature control is 1180°C; the rolling start temperature is 1025°C; the finishing rolling temperature is 920°C; all the 5-stage water passing tanks in the water passing and cooling after rolling are opened, the water is passed evenly, and the recovery temperature is ≤30°C , weak water penetration at the end; the spinning temperature is controlled to be 900°C; the air-cooling line speed in the roller table speed control is 0.7m / s, the phase change position is 0.9m / s, and the speed in the heat preservation cover is 0.5m / s, Other speeds are 0.7m / s; the air volume control in the fan and air-cooling control is 45%, and the c...

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Abstract

The invention relates to the technical field of smelting, in particular to a controlled production method for a pickling-free SWRH82B hot rolled wire rod oxidized iron sheet. The wire rod spinning temperature is increased by controlling the rolling temperature and intensive pressure water cooling of a control wire rod generated on the wire rod surface oxidized iron sheet; and then a roller way, afan and an insulating cover are controlled to cooperate with one another, the wire rod cooling rate is adjusted, thickening of the oxidized iron sheet is achieved, the stripping performance of the wire rod is improved, not only can the pickling-free direct drawing process requirements of a machining user be met, but also the surface treatment cost of the wire rod can be reduced, and the wire rod product adaptability and the low-cost competitiveness of the user are improved.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a controlled production method for pickling-free SWRH82B hot-rolled wire rod oxide scale. Background technique [0002] SWRH82B wire rod is an important metal raw material for making prestressed steel strand and prestressed steel wire. Its manufacturing process is to process the surface of the wire rod first, then draw it, and then make it into a strand product with corresponding specifications and performance. Wire rod surface treatment is a very important process in the wire drawing process. The traditional treatment method is pickling with chemical substances to remove the surface oxide scale and rust. This process is simple to operate, easy to master, and the quality of pickling treatment is stable. However, the "three wastes" such as waste acid, waste water, and waste gas brought about by pickling have high treatment costs and labor costs, and have caused environmental prob...

Claims

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Application Information

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IPC IPC(8): B21B37/74B21B37/46B21B37/00
CPCB21B37/00B21B37/46B21B37/74
Inventor 江金东翟勇强练昌何瞻周德孔祥涛刘珂吴学林李正嵩魏福龙
Owner SHOUGANG SHUICHENG IRON & STEEL GRP
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